Combined muffler and air-heater.



E. D. LEWIS.

GOMBINED MUPLBR AND Am HEATER.

APPLIGATIOE FILED APB.. 18, 1910.

Patented Sept. 19, 1911.

iozo,

UNiTED STATES PATENT oEEIcE.

EDWARD DUDLEY LEWIS, 0F ELMIRA, NEW YORK.

COMBINED MUFFLER AND AIR-HEATER.

Specification of Letters Patent. Patented Sept.A 19, 1911.

Application led April 18, 1910. Serial No. 556,264. 'I

To all whom 'it may concern:

I Be it known that I, EDWARD D. LEWIS, a citizen of the United States, residing at Elmira, 1n the county of Chemung and State of N ew York, have invented certain new and useful Improvements in a Combined Muffler and Air-Heater; and I do declare lthe following to be a full, clear, and exact description of the invention, such as `will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to combined muf# fiers and air heaters for gasolene engines.

The object of the invention is to provide an improved construction of muiiler for gasolene or similar forms of engines whereby the exhaust from the'engine in passing view, the invention consists of certain novel through the muiiier is utilized for heating purposes.

Wlth the foregoing and other Objects in features of construction, combination and arrangement of parts as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 is a vertical longitudinal sectioniof a combined muiiier and heaterconstructed in accordance with the invention and showing the manner in which the heated air from the muiiier may be utilized. Fig. 2 is a vertical section on the line 2-2 of Fig. 1; and, Fig. 3 is a vertical view through one of the muiiier sections taken onv the line 3-3 of Fi. 1, and showing the construction of the ba e plate arranged therein.

In the practical embodiment of the inven- Ation I provide an air chamber l which is preferably constructed in the form of a sheet metal cylinder closed by heads 2 and bound or covered on its outer side with an Aasbestos .wrapping 3, one of the heads 2 bedischarge with suitable registers which may be set into a floor or wall. The register 8 is here shown as being provided with a. cap 9 for closing or regulating the opening thereof7 said cap having formed on its under side spring fingers 10 having beveledcatches 11 60 formed on their inner ends said catches being adapted to be engaged with a series of teeth or notches 1 2 formed on the inner sides of the register whereby the cap 9 may be supported at the desired elevation above v the opening in the register. In the register are also provided stop shoulders 13 which arevadapted to be engaged by the catchesy 11 thus preventing the cap from being disengaged from the register. Thecap 9 is 70 preferably provided with a chain 14 having on its end a ring 15 whereby the cap may be conveniently raised when desired.v

Arrangedl in the cylinder 1 is an exhaust muflier comprising a series of hollow sections 16 which are connected together at their center by tubular coupling members 1T the ends of which are inserted through and clenched or riveted into engagement with the adjacent sides of the muliier sections as shown. The end section of the muffler at each end of the cylinder 1 is provided with a threaded nipple 18 which is inserted through the head 2 of the cylinder and is provided with a jam nut 19 for 85 securing the sections to the cylinder. Each of the sections 16 of the muler is formed in two vparts having on their outer edges Hanges 20 which when the parts are engaged are riveted together to hold the parts in position thus forming the hollow sections of the muffler. Arranged^ in the center of the sections and secured at their outer edges between the parts of the sections are baie plates 21 in which vadjacent to their 95 outer edges is formed an annular series of passages 22 through 'which the exhaust gases pass from one part of the muiiier sections to the other. The baie plates 21 are pressed outwardly to a point .at their centers thus forming a projection which'ex. tends in the direction .from which the exhaust is coming and serves to deflect the exhaust gases toward the apertures around the outer edges of the plates as indicated by the" arrows in Fig. l of the drawings. The riveted flanges of the muffler sections are out away to form air passages 23 said passages being arranged at diametrieally opposite points in the consecutive or adjoining sections so that a circuitous or tortuous passage is l formed through the cylinder which will cause a thorough circulation of the air around and between the muilier sections thereby heating the air by its contact with said sections, the latter being kept hot by the passage of the exhaust gases there-` through, said gases being caused to thor oughly circulate through each of the sections by means of the battle plates and passages therein before passing through the couplings 17 into the next muiiler section. rI`he air to be heated enters through the open end of the cylinder and passes through thev same in the manner described and is discharged through the port 4 and nipple 5 into the heat conducting pipes 7 by .which it is conveyed to the registers and discharged into the rooms or compartments to be heated. rIhe exhaust from `the engine enters the center of the first muffler section at thepopen end of the cylinder through a suitable connecting nipple provided to receive the exhaustconducting pipe from the engine and passes through the entire series of sections and is discharged through the nipple 18 on the last muitler section at the closed end of the Vcylinder as indicated by the arrows in F ig. 1 of the drawings.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood Without requiring a more extended explanation.

`Various changes in the form, proportion,

and the minor details of construction may be resorted to without departing from the principle or sacriicing. any of the advantages of this invention as defined in the appended claims.

Having thus what I claim is:

1. A heater comprising, an outer casing having an inlet at one end and an outlet at the other end, intercommun'icating hol-y low sections arranged transverselyA of the said casing and having flanged edges in contact therewith, said flanges having openings out of alinement with each other, thereby forming a tortuous air passage; the end hollow "sections being' provided with an inlet and an outlet respectively for the heating medium.

described my invention Q. A heater comprising an outer casing` having an inlet at one end and an outlet at the other, intercommunicating hollow sections arranged transversely of and closely fitting the interior of the said casing and each formed of two oppositely dis- .posed centrally perforated concave members having anged edges and a baiilenlate located between said members, perforated beyond its center and united at its margin to the flanges of said concave members; the outer margins of the hollow sections thus formed having openings out of alinement with each other to form a tortuous air passage; the end hollow sections being provided with an inlet andan outlet respectively for the heating medium.

3. In a combined muliier and air heater, a casing having an air inlet opening at one end and an air outlet opening adjacent its opposite end, and an air conducting pipe communicating with the outlet opening, a series of hollow mufier sections arranged in said casing, each of said sections comprising two oppositely disposed substantially similar connected portions having i'langed edges adapted to contact with the inner periphery of the cylinder, each of said sections being provided with an air passage through said flanged edges, the passage of each section being arranged at a diametrically opposite point from the passage of the contiguous sections whereby a circuitous air passage-is formed through the casing around said sections, one end section having an inlet for exhaust gas and the opposite end section having an outlet for the same, battle plates secured in said sections between the oppositely disposed portions, said plates having formed therein a series of passage-s, means upon each of said plates whereby the exhaust gases entering the sections are deflected toward the passages in said plates, and means to connect said sections together to form a continuous gas passage through the sections.

4. In a combined muffler andair heater, an asbestos covered casing open at one end and provided at its opposite end with an air discharge passage, and an air conducting i pipe connected with said discharge passage, a heat distributing register secured to the opposite end of said-pipe, a series of hol-v low muffler sections arranged in said casf ing, said sections being formed in two parts having flanged attaching edges adapted to Contact with the inner periphery of the cylinder, said flanges being cut away to form an air passage, the passage of one of said muiiler sections being arranged at a diametrically opposite point in the casing from the passage of the adjoining muiiier section whereby a circuitousl air passage is formed through the casing around said sections, ,battle plates secured in'said sections between the anged edges thereof, said plates having formed therein a series of passages and each of said plates also hav-.L-

gas and the oppoing an inlet for exhaust an outlet for the site end section having same.

5. A combmed muffler and heater com- .5 prising a casing having air and gas inlets atv one end and air and gas youtlets at its opposite end, hollow muilier sections arranged transversely within the casing and having anged ledges in Contact with the 10 inner walls thereof, said flanged edges betions and the 'gas inlet and gas outlet respectively whereby a continuous gas passage is for-med through the sections between the gas inlet and gas outlet of the casing, and means within each section for imparting a tortuous circulation to the gas passing therethrough.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

EDWARD DUDLEY LEWIS. Witnesses: l

v BURTON E. MASTER,

MARY L. MACDONALD. 

